/*
Effect description:
Counter interrupt: program execution through external count
Press the interrupt button once, the upper four bits will light up when the interrupt occurs, and the program will return to the main program after the interrupt occurs.
*/
#include
#include
unsigned int i;
void delay()//delay sub-function
{
i=50000;
while(i--);
}
//unsigned char TCOM;
//Interrupt initialization
void center1()
{
ET0 = 1; //Start the counter interrupt switch
EA = 1; // Main switch
/*
The core of the counter is here
*/
TH0 = 255; // press once to interrupt
TL0 = 255;
TMOD = 0x05; //0000 0101 in counter mode
TR0 = 1; //Start the timer
}
void main()//main function
{
zhongduan1(); //Interrupt initialization
while(1) //while infinite loop, the main program keeps executing, that is, the lower four bits are always on, when an interrupt occurs, the interrupt function program is executed, and after the interrupt occurs, it returns to the main program
{
P0 = 0xf0; //light up the lower four bits
}
}
//The interrupt program is the program to be executed after the interrupt
void zhongduan() interrupt 1
{
P0 = ~0xf0; //high four bits are bright
delay(); //delay sub-function call is converted into the time to execute the program when the interrupt occurs
TH0 = 255;
TL0 = 255;
}
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